Improvement in polishing stone cylinders



Y 6.0.MA13RICE.

\ POLISHING STONE CYLINDERS Eatented Nov. 7, 18 76 CHARLES C. MAURICE,OF .NEW YORK. N. Y.

IMPROVEMENT IN POLISHING STONE CYLINDERS.

Specification formingpart of Letters Patent No. I $4,212. dated November7,1876, application filed May 6, 1876.

To all whom it may concern Be it known that I, CHARLES C. MAURICE, ofthe city, county, and State of New York, have invented a new andImproved Machine for Turning and Polishing Stone and other Material,which improvement is fully set forth in the following specification,reference being had to the accompanying drawing, in Which Figure 1represents a .plan or top view. Fig. 2 is a vertical section in theplane :0 m, Fig. 1.

Similar letters indicate corresponding parts.

This invention relates to a turning-machine which is provided with fixedbearings for the reception of the shaft or gudgeons of the cylinder tobe turned, and with a guide-rod and a tool-stock, which carries acutting-tool and a grinding and polishing tool, and which moves back andforth automatically by the action of a right-and-left-handscrew-spindle, which runs parallel to the cylinder to be turned andpolished.

In the drawing, the letter A designates a bed-plate of cast-iron or anyother suitable material. From this bed-plate rise two or more standards,B, which form the bearings for the shaft or gudgeons G of the cylinderD, which is to be turned and polished. On the ends of this shaft arepulleys E, on which run belts, which extend downward, so that thejournals of the shaft 0 are held down in their bearings, and the surfaceof the cylinder, when turned off, will be true or concentric with saidjournals.

From the bed-plate A also rise the standards F, two or more, which formthe bearings for a shaft, G, and for a fixed guide-rod, H, both saidshaft and guide-rod running parallel to-the shaft l of the cylinder tobe turned. On the shaft G is formed a duplex right and left handscrew-thread, a, which engages with a fork, b, secured in the tool-stockI, and a slow revolving motion is imparted to said shaft by a belt andpulley, or by any other suitable means.

The tool-stock slides on the guide-rod H, and it contains two toolclamps or holders, 0 done for the reception of a cutting-tool, e, andthe other for a grinding and polishing tool, f. As the shaft G revolves,the tool-stock is caused to traverse back and forth on its guiderod bythe action of its duplex right and left hand screw thread, and by theaction of the tools 6 andfthe cylinder D is turned and polished at oneoperation in a comparatively short time.

In order to produce cylinders of uniform thickness throughout theirentire length, it is indispensable that the guide-rod H shall be exactlyparallel to the shaft 0 5 and to accomplish this object the standards Fare made adjustable, so that the position of the guiderod and of thetool-stock can be regulated as may be required.

This machine is particularly intended for turning cylindrical stones forlithographic printing; but it can also be used for turning cylinders ofany other material.

In practice, I extend the tool-stock, and

provide the same with two or more pairs of tool-clamps, at suitabledistances apart, so that I can turn and polish simultaneously two ormore cylinders, as indicated in the drawlng.

' It will be noticed that in my machine the cutting-tool c is situatedon one, and the grinding or polishing tool on the opposite, side of thework, and in practice, particularly for turning stones, I propose to usea cutter of diamond and a polishing-tool of emery. These tools may beapplied at the same time, or one after the other, according to thenature of the work.

What I claim as new, and desire to secure by Letters Patent, is-

The combination of fixed bearings B for the shaft 0 of the cylinder, tobe turned with a guide-rod, H, running parallel to said shaft, atool-stock, I, and a duplex right-and-left-hand screw-spindle, G, whichengages with the toolstock, the whole being constructed and operatingsubstantially in the manner herein shown and described.

In testimony that I claim the foregoing I have hereunto set my hand andseal this 4th day of May, A. D. 1876.

CHARLES C. MAURIOE. [L.

Witnesses:

W. HA'UFF, RoB'r. E. MILLER.

